- nginx: added security checks when deleting vhost subdomains, so no paths still used by other subdomains or the main web get deleted accidently
- added check for vhostsubdomains to remove beginning and trailing slashes from web path.
- removed check for duplicate folder usage.

- Extended SEO redirect check for subdomains/alias domains.

- Make sure alias domain SEO redirects get written only if they don't collide with SEO redirects from parent web site.

- Several changes in SEO redirects implementation.

- Added PayPal email address field to client and reseller form.
- Added missing bank details fields to reseller form.

- nginx alias/subdomain redirects: Added parenthese around non-capturing parentheses so that $2 captures the correct content.

- Added missing language strings to german language file.

- Fixed errors in system.inc.php-

- Fixed missing templates and language entries
- Previous subdomain mode can be used concurrently
- Changed log path to a more convenient location

- nginx: merge function: default action is now to replace older locations in the nginx vhost configuration; a merge  instead of a replacement can be achieved by putting the string "##merge##" (without quotes) at the end of the most recent location line (e.g. "location ~ \.php$ { ##merge##").